18126541519 has 4 divisors (see below), whose sum is σ = 19080570040. Its totient is φ = 17172513000.

The previous prime is 18126541483. The next prime is 18126541541. The reversal of 18126541519 is 91514562181.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18126541519 - 2⁹ = 18126541007 is a prime.

It is a super-2 number, since 2×18126541519² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18126541579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477014232 + ... + 477014269.

It is an arithmetic number, because the mean of its divisors is an integer number (4770142510).

Almost surely, 2^18126541519 is an apocalyptic number.

18126541519 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

18126541519 is a deficient number, since it is larger than the sum of its proper divisors (954028521).

18126541519 is an equidigital number, since it uses as much as digits as its factorization.

18126541519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954028520.

The product of its digits is 86400, while the sum is 43.

It can be divided in two parts, 181265 and 41519, that added together give a square (222784 = 472²).

The spelling of 18126541519 in words is "eighteen billion, one hundred twenty-six million, five hundred forty-one thousand, five hundred nineteen".